63685388 has 24 divisors (see below), whose sum is σ = 120951600. Its totient is φ = 29165760.

The previous prime is 63685381. The next prime is 63685411. The reversal of 63685388 is 88358636.

63685388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63685381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2138 + ... + 11486.

It is an arithmetic number, because the mean of its divisors is an integer number (5039650).

Almost surely, 2^63685388 is an apocalyptic number.

It is an amenable number.

63685388 is a deficient number, since it is larger than the sum of its proper divisors (57266212).

63685388 is a wasteful number, since it uses less digits than its factorization.

63685388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9497 (or 9495 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 63685388 is about 7980.3125252085. The cubic root of 63685388 is about 399.3434813811.

The spelling of 63685388 in words is "sixty-three million, six hundred eighty-five thousand, three hundred eighty-eight".